{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-106119", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-10-06T15:33:55.333Z", "datePublished": "2026-10-06T18:01:24.262Z", "dateUpdated": "2026-10-06T19:45:43.997Z"}, "containers": {"cna": {"title": "LangChain: MongoDBChatMessageHistory query injection can allow cross-session access", "problemTypes": [{"descriptions": [{"cweId": "CWE-943", "lang": "en", "description": "CWE-943: Improper Neutralization of Special Elements in Data Query Logic", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 6, "baseSeverity": "MEDIUM", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/langchain-ai/langchainjs/security/advisories/GHSA-m6rx-h84q-8r95", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/langchain-ai/langchainjs/security/advisories/GHSA-m6rx-h84q-8r95"}, {"name": "https://github.com/langchain-ai/langchainjs/pull/11672", "tags": ["x_refsource_MISC"], "url": "https://github.com/langchain-ai/langchainjs/pull/11672"}, {"name": "https://github.com/langchain-ai/langchainjs/commit/946e3d856ff1f8ce7f7b9374c83f680a6ada79af", "tags": ["x_refsource_MISC"], "url": "https://github.com/langchain-ai/langchainjs/commit/946e3d856ff1f8ce7f7b9374c83f680a6ada79af"}, {"name": "https://github.com/langchain-ai/langchainjs/releases/tag/@langchain/mongodb@1.3.1", "tags": ["x_refsource_MISC"], "url": "https://github.com/langchain-ai/langchainjs/releases/tag/@langchain/mongodb@1.3.1"}], "affected": [{"vendor": "langchain-ai", "product": "langchainjs", "versions": [{"version": "< 1.5.14", "status": "affected"}]}, {"vendor": "@langchain", "product": "mongodb", "versions": [{"version": "< 1.3.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-06T18:01:24.262Z"}, "descriptions": [{"lang": "en", "value": "LangChain is a framework for building LLM-powered applications. Prior to 1.3.1, MongoDBChatMessageHistory does not enforce the documented string type for an untrusted structured session identifier at runtime, allowing the identifier to be interpreted as a MongoDB query condition rather than as a literal value when multiple users' histories are stored in a shared MongoDB collection. An attacker able to invoke chat-history operations can read, modify, or delete another user's stored conversation. Applications using authenticated, server-controlled string identifiers are not affected. This issue is fixed in version 1.3.1."}], "source": {"advisory": "GHSA-m6rx-h84q-8r95", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-10-06T19:45:00.727020Z", "id": "CVE-2026-106119", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-06T19:45:43.997Z"}}]}}

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{"affected": [{"affectedData": [{"product": "langchainjs", "vendor": "langchain-ai", "versions": [{"status": "affected", "version": "< 1.5.14"}]}, {"product": "mongodb", "vendor": "@langchain", "versions": [{"status": "affected", "version": "< 1.3.1"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "LangChain is a framework for building LLM-powered applications. Prior to 1.3.1, MongoDBChatMessageHistory does not enforce the documented string type for an untrusted structured session identifier at runtime, allowing the identifier to be interpreted as a MongoDB query condition rather than as a literal value when multiple users' histories are stored in a shared MongoDB collection. An attacker able to invoke chat-history operations can read, modify, or delete another user's stored conversation. Applications using authenticated, server-controlled string identifiers are not affected. This issue is fixed in version 1.3.1."}], "id": "CVE-2026-106119", "lastModified": "2026-10-06T19:17:42.800", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.0, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-10-06T19:17:42.800", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/langchain-ai/langchainjs/commit/946e3d856ff1f8ce7f7b9374c83f680a6ada79af"}, {"source": "security-advisories@github.com", "url": "https://github.com/langchain-ai/langchainjs/pull/11672"}, {"source": "security-advisories@github.com", "url": "https://github.com/langchain-ai/langchainjs/releases/tag/@langchain/mongodb@1.3.1"}, {"source": "security-advisories@github.com", "url": "https://github.com/langchain-ai/langchainjs/security/advisories/GHSA-m6rx-h84q-8r95"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-943"}], "source": "security-advisories@github.com", "type": "Primary"}]}

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